aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.bind.v2.runtime.unmarshaller;
aoqi@0: 
aoqi@0: import javax.xml.namespace.NamespaceContext;
aoqi@0: import javax.xml.validation.Schema;
aoqi@0: import javax.xml.validation.ValidatorHandler;
aoqi@0: 
aoqi@0: import com.sun.xml.internal.bind.v2.util.FatalAdapter;
aoqi@0: 
aoqi@0: import org.xml.sax.SAXException;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * {@link XmlVisitor} decorator that validates the events by using JAXP validation API.
aoqi@0:  *
aoqi@0:  * @author Kohsuke Kawaguchi
aoqi@0:  */
aoqi@0: final class ValidatingUnmarshaller implements XmlVisitor, XmlVisitor.TextPredictor {
aoqi@0: 
aoqi@0:     private final XmlVisitor next;
aoqi@0:     private final ValidatorHandler validator;
aoqi@0:     private NamespaceContext nsContext = null;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * {@link TextPredictor} of the next {@link XmlVisitor}.
aoqi@0:      */
aoqi@0:     private final TextPredictor predictor;
aoqi@0: 
aoqi@0:     private char[] buf = new char[256];
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Creates a new instance of ValidatingUnmarshaller.
aoqi@0:      */
aoqi@0:     public ValidatingUnmarshaller( Schema schema, XmlVisitor next ) {
aoqi@0:         this.validator = schema.newValidatorHandler();
aoqi@0:         this.next = next;
aoqi@0:         this.predictor = next.getPredictor();
aoqi@0:         // if the user bothers to use a validator, make validation errors fatal
aoqi@0:         // so that it will abort unmarshalling.
aoqi@0:         validator.setErrorHandler(new FatalAdapter(getContext()));
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startDocument(LocatorEx locator, NamespaceContext nsContext) throws SAXException {
aoqi@0:         this.nsContext = nsContext;
aoqi@0:         validator.setDocumentLocator(locator);
aoqi@0:         validator.startDocument();
aoqi@0:         next.startDocument(locator,nsContext);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endDocument() throws SAXException {
aoqi@0:         this.nsContext = null;
aoqi@0:         validator.endDocument();
aoqi@0:         next.endDocument();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startElement(TagName tagName) throws SAXException {
aoqi@0:         if(nsContext != null) {
aoqi@0:             String tagNamePrefix = tagName.getPrefix().intern();
aoqi@0:             if(tagNamePrefix != "") {
aoqi@0:                 validator.startPrefixMapping(tagNamePrefix, nsContext.getNamespaceURI(tagNamePrefix));
aoqi@0:             }
aoqi@0:         }
aoqi@0:         validator.startElement(tagName.uri,tagName.local,tagName.getQname(),tagName.atts);
aoqi@0:         next.startElement(tagName);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endElement(TagName tagName ) throws SAXException {
aoqi@0:         validator.endElement(tagName.uri,tagName.local,tagName.getQname());
aoqi@0:         next.endElement(tagName);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startPrefixMapping(String prefix, String nsUri) throws SAXException {
aoqi@0:         validator.startPrefixMapping(prefix,nsUri);
aoqi@0:         next.startPrefixMapping(prefix,nsUri);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endPrefixMapping(String prefix) throws SAXException {
aoqi@0:         validator.endPrefixMapping(prefix);
aoqi@0:         next.endPrefixMapping(prefix);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void text( CharSequence pcdata ) throws SAXException {
aoqi@0:         int len = pcdata.length();
aoqi@0:         if(buf.length<len) {
aoqi@0:             buf = new char[len];
aoqi@0:         }
aoqi@0:         for( int i=0;i<len; i++ )
aoqi@0:             buf[i] = pcdata.charAt(i);  // isn't this kinda slow?
aoqi@0: 
aoqi@0:         validator.characters(buf,0,len);
aoqi@0:         if(predictor.expectText())
aoqi@0:             next.text(pcdata);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public UnmarshallingContext getContext() {
aoqi@0:         return next.getContext();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public TextPredictor getPredictor() {
aoqi@0:         return this;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // should be always invoked through TextPredictor
aoqi@0:     @Deprecated
aoqi@0:     public boolean expectText() {
aoqi@0:         // validator needs to make sure that there's no text
aoqi@0:         // even when it's not expected. So always have them
aoqi@0:         // send text, ignoring optimization hints from the unmarshaller
aoqi@0:         return true;
aoqi@0:     }
aoqi@0: }